FillDoku是一個邏輯難題完成時，形成的圖像
FillDoku is a logic puzzle that forms a picture when completed. It is similar to minesweeper - there's a grid with numbers as clues and you figure out which squares should be filled in.
This form of puzzle is sometimes known as Nurie, Nampre, Mosaik, Japanese Mosaic, Count and Darken, or Fill-a-Pix.
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